Enhanced backscattering and modal echo of reverberant elastic waves
Enhanced backscattering and modal echo of reverberant elastic waves
复制标题
混响弹性波的增强后向散射和模态回波
DOI：
10.1103/physrevlett.84.4942
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发表时间：
2000
影响因子：
8.6
通讯作者：
Lobkis
中科院分区：
文献类型：
--
作者：
Weaver;Lobkis
我们报告的相干后向散射波在三维弹性体的实验证据。超声频谱能量密度随之而来的瞬态激励测量作为时间和距离的函数从源。与随机矩阵理论的预测雅阁，在源附近发现了增强，在早期为2的弱局部化因子，但在晚期为3的因子。该效应似乎与吸收无关。
We report experimental evidence for coherent backscattering of waves in a three-dimensional elastic body. Ultrasonic spectral energy density consequent to a transient excitation is measured as a function of time and of distance from the source. In accord with the predictions of random matrix theory, an enhancement is found near the source by a weak localization factor of 2 at early times, but a factor of 3 at late times. The effect appears to be independent of absorption.